BSF (R32, M32)

With unroll_count=500 and no inner loop

Code:

   0:	45 0f bc 06          	bsf    r8d,DWORD PTR [r14]

Show nanoBench command
Results:
- Instructions retired: 1.0
- Core cycles: 10.0
- Reference cycles: 6.47
- UOPS_RETIRED.ANY: 11.0
- UOPS_MS: 11.0

With loop_count=1000 and unroll_count=10

Code:

   0:	45 0f bc 06          	bsf    r8d,DWORD PTR [r14]

Show nanoBench command
Results:
- Instructions retired: 1.2
- Core cycles: 10.1
- Reference cycles: 6.59
- UOPS_RETIRED.ANY: 11.2
- UOPS_MS: 11.0

With loop_count=100 and unroll_count=100

Code:

   0:	45 0f bc 06          	bsf    r8d,DWORD PTR [r14]

Show nanoBench command
Results:
- Instructions retired: 1.02
- Core cycles: 10.03
- Reference cycles: 6.55
- UOPS_RETIRED.ANY: 11.02
- UOPS_MS: 11.0

With 4 independent instructions

With unroll_count=200 and no inner loop

Code:

   0:	45 0f bc 06          	bsf    r8d,DWORD PTR [r14]
   4:	45 0f bc 4e 04       	bsf    r9d,DWORD PTR [r14+0x4]
   9:	45 0f bc 56 08       	bsf    r10d,DWORD PTR [r14+0x8]
   e:	45 0f bc 5e 0c       	bsf    r11d,DWORD PTR [r14+0xc]

Show nanoBench command
Results:
- Instructions retired: 4.0
- Core cycles: 40.01
- Reference cycles: 26.2
- UOPS_RETIRED.ANY: 44.0
- UOPS_MS: 44.0

With loop_count=1000 and unroll_count=2

Code:

   0:	45 0f bc 06          	bsf    r8d,DWORD PTR [r14]
   4:	45 0f bc 4e 04       	bsf    r9d,DWORD PTR [r14+0x4]
   9:	45 0f bc 56 08       	bsf    r10d,DWORD PTR [r14+0x8]
   e:	45 0f bc 5e 0c       	bsf    r11d,DWORD PTR [r14+0xc]

Show nanoBench command
Results:
- Instructions retired: 5.0
- Core cycles: 40.5
- Reference cycles: 27.23
- UOPS_RETIRED.ANY: 45.0
- UOPS_MS: 44.0

With loop_count=100 and unroll_count=20

Code:

   0:	45 0f bc 06          	bsf    r8d,DWORD PTR [r14]
   4:	45 0f bc 4e 04       	bsf    r9d,DWORD PTR [r14+0x4]
   9:	45 0f bc 56 08       	bsf    r10d,DWORD PTR [r14+0x8]
   e:	45 0f bc 5e 0c       	bsf    r11d,DWORD PTR [r14+0xc]

Show nanoBench command
Results:
- Instructions retired: 4.1
- Core cycles: 40.05
- Reference cycles: 26.14
- UOPS_RETIRED.ANY: 44.1
- UOPS_MS: 44.0

With 8 independent instructions

With unroll_count=100 and no inner loop

Code:

   0:	45 0f bc 06          	bsf    r8d,DWORD PTR [r14]
   4:	45 0f bc 4e 04       	bsf    r9d,DWORD PTR [r14+0x4]
   9:	45 0f bc 56 08       	bsf    r10d,DWORD PTR [r14+0x8]
   e:	45 0f bc 5e 0c       	bsf    r11d,DWORD PTR [r14+0xc]
  13:	45 0f bc 66 10       	bsf    r12d,DWORD PTR [r14+0x10]
  18:	41 0f bc 5e 14       	bsf    ebx,DWORD PTR [r14+0x14]
  1d:	41 0f bc 4e 18       	bsf    ecx,DWORD PTR [r14+0x18]
  22:	41 0f bc 56 1c       	bsf    edx,DWORD PTR [r14+0x1c]

Show nanoBench command
Results:
- Instructions retired: 8.0
- Core cycles: 80.01
- Reference cycles: 52.26
- UOPS_RETIRED.ANY: 88.0
- UOPS_MS: 88.0

With loop_count=1000 and unroll_count=1

Code:

   0:	45 0f bc 06          	bsf    r8d,DWORD PTR [r14]
   4:	45 0f bc 4e 04       	bsf    r9d,DWORD PTR [r14+0x4]
   9:	45 0f bc 56 08       	bsf    r10d,DWORD PTR [r14+0x8]
   e:	45 0f bc 5e 0c       	bsf    r11d,DWORD PTR [r14+0xc]
  13:	45 0f bc 66 10       	bsf    r12d,DWORD PTR [r14+0x10]
  18:	41 0f bc 5e 14       	bsf    ebx,DWORD PTR [r14+0x14]
  1d:	41 0f bc 4e 18       	bsf    ecx,DWORD PTR [r14+0x18]
  22:	41 0f bc 56 1c       	bsf    edx,DWORD PTR [r14+0x1c]

Show nanoBench command
Results:
- Instructions retired: 10.0
- Core cycles: 81.0
- Reference cycles: 52.88
- UOPS_RETIRED.ANY: 90.0
- UOPS_MS: 88.0

With loop_count=100 and unroll_count=10

Code:

   0:	45 0f bc 06          	bsf    r8d,DWORD PTR [r14]
   4:	45 0f bc 4e 04       	bsf    r9d,DWORD PTR [r14+0x4]
   9:	45 0f bc 56 08       	bsf    r10d,DWORD PTR [r14+0x8]
   e:	45 0f bc 5e 0c       	bsf    r11d,DWORD PTR [r14+0xc]
  13:	45 0f bc 66 10       	bsf    r12d,DWORD PTR [r14+0x10]
  18:	41 0f bc 5e 14       	bsf    ebx,DWORD PTR [r14+0x14]
  1d:	41 0f bc 4e 18       	bsf    ecx,DWORD PTR [r14+0x18]
  22:	41 0f bc 56 1c       	bsf    edx,DWORD PTR [r14+0x1c]

Show nanoBench command
Results:
- Instructions retired: 8.2
- Core cycles: 80.1
- Reference cycles: 52.26
- UOPS_RETIRED.ANY: 88.2
- UOPS_MS: 88.0

With an indexed addressing mode

With 1 independent instruction

With unroll_count=500 and no inner loop

Code:

   0:	47 0f bc 04 2e       	bsf    r8d,DWORD PTR [r14+r13*1]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 1.0
- Core cycles: 10.0
- Reference cycles: 6.5
- UOPS_RETIRED.ANY: 11.0
- UOPS_MS: 11.0

With loop_count=1000 and unroll_count=10

Code:

   0:	47 0f bc 04 2e       	bsf    r8d,DWORD PTR [r14+r13*1]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 1.2
- Core cycles: 10.1
- Reference cycles: 6.59
- UOPS_RETIRED.ANY: 11.2
- UOPS_MS: 11.0

With loop_count=100 and unroll_count=100

Code:

   0:	47 0f bc 04 2e       	bsf    r8d,DWORD PTR [r14+r13*1]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 1.02
- Core cycles: 10.01
- Reference cycles: 6.53
- UOPS_RETIRED.ANY: 11.02
- UOPS_MS: 11.0

With 4 independent instructions

With unroll_count=200 and no inner loop

Code:

   0:	47 0f bc 04 2e       	bsf    r8d,DWORD PTR [r14+r13*1]
   5:	47 0f bc 4c 2e 04    	bsf    r9d,DWORD PTR [r14+r13*1+0x4]
   b:	47 0f bc 54 2e 08    	bsf    r10d,DWORD PTR [r14+r13*1+0x8]
  11:	47 0f bc 5c 2e 0c    	bsf    r11d,DWORD PTR [r14+r13*1+0xc]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 4.0
- Core cycles: 40.0
- Reference cycles: 28.54
- UOPS_RETIRED.ANY: 44.0
- UOPS_MS: 44.0

With loop_count=1000 and unroll_count=2

Code:

   0:	47 0f bc 04 2e       	bsf    r8d,DWORD PTR [r14+r13*1]
   5:	47 0f bc 4c 2e 04    	bsf    r9d,DWORD PTR [r14+r13*1+0x4]
   b:	47 0f bc 54 2e 08    	bsf    r10d,DWORD PTR [r14+r13*1+0x8]
  11:	47 0f bc 5c 2e 0c    	bsf    r11d,DWORD PTR [r14+r13*1+0xc]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 5.0
- Core cycles: 40.5
- Reference cycles: 26.42
- UOPS_RETIRED.ANY: 45.0
- UOPS_MS: 44.0

With loop_count=100 and unroll_count=20

Code:

   0:	47 0f bc 04 2e       	bsf    r8d,DWORD PTR [r14+r13*1]
   5:	47 0f bc 4c 2e 04    	bsf    r9d,DWORD PTR [r14+r13*1+0x4]
   b:	47 0f bc 54 2e 08    	bsf    r10d,DWORD PTR [r14+r13*1+0x8]
  11:	47 0f bc 5c 2e 0c    	bsf    r11d,DWORD PTR [r14+r13*1+0xc]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 4.1
- Core cycles: 40.05
- Reference cycles: 26.13
- UOPS_RETIRED.ANY: 44.1
- UOPS_MS: 44.0

With 8 independent instructions

With unroll_count=100 and no inner loop

Code:

   0:	47 0f bc 04 2e       	bsf    r8d,DWORD PTR [r14+r13*1]
   5:	47 0f bc 4c 2e 04    	bsf    r9d,DWORD PTR [r14+r13*1+0x4]
   b:	47 0f bc 54 2e 08    	bsf    r10d,DWORD PTR [r14+r13*1+0x8]
  11:	47 0f bc 5c 2e 0c    	bsf    r11d,DWORD PTR [r14+r13*1+0xc]
  17:	47 0f bc 64 2e 10    	bsf    r12d,DWORD PTR [r14+r13*1+0x10]
  1d:	43 0f bc 5c 2e 14    	bsf    ebx,DWORD PTR [r14+r13*1+0x14]
  23:	43 0f bc 4c 2e 18    	bsf    ecx,DWORD PTR [r14+r13*1+0x18]
  29:	43 0f bc 54 2e 1c    	bsf    edx,DWORD PTR [r14+r13*1+0x1c]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 8.0
- Core cycles: 80.0
- Reference cycles: 52.13
- UOPS_RETIRED.ANY: 88.0
- UOPS_MS: 88.0

With loop_count=1000 and unroll_count=1

Code:

   0:	47 0f bc 04 2e       	bsf    r8d,DWORD PTR [r14+r13*1]
   5:	47 0f bc 4c 2e 04    	bsf    r9d,DWORD PTR [r14+r13*1+0x4]
   b:	47 0f bc 54 2e 08    	bsf    r10d,DWORD PTR [r14+r13*1+0x8]
  11:	47 0f bc 5c 2e 0c    	bsf    r11d,DWORD PTR [r14+r13*1+0xc]
  17:	47 0f bc 64 2e 10    	bsf    r12d,DWORD PTR [r14+r13*1+0x10]
  1d:	43 0f bc 5c 2e 14    	bsf    ebx,DWORD PTR [r14+r13*1+0x14]
  23:	43 0f bc 4c 2e 18    	bsf    ecx,DWORD PTR [r14+r13*1+0x18]
  29:	43 0f bc 54 2e 1c    	bsf    edx,DWORD PTR [r14+r13*1+0x1c]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 10.0
- Core cycles: 81.0
- Reference cycles: 52.86
- UOPS_RETIRED.ANY: 90.0
- UOPS_MS: 88.0

With loop_count=100 and unroll_count=10

Code:

   0:	47 0f bc 04 2e       	bsf    r8d,DWORD PTR [r14+r13*1]
   5:	47 0f bc 4c 2e 04    	bsf    r9d,DWORD PTR [r14+r13*1+0x4]
   b:	47 0f bc 54 2e 08    	bsf    r10d,DWORD PTR [r14+r13*1+0x8]
  11:	47 0f bc 5c 2e 0c    	bsf    r11d,DWORD PTR [r14+r13*1+0xc]
  17:	47 0f bc 64 2e 10    	bsf    r12d,DWORD PTR [r14+r13*1+0x10]
  1d:	43 0f bc 5c 2e 14    	bsf    ebx,DWORD PTR [r14+r13*1+0x14]
  23:	43 0f bc 4c 2e 18    	bsf    ecx,DWORD PTR [r14+r13*1+0x18]
  29:	43 0f bc 54 2e 1c    	bsf    edx,DWORD PTR [r14+r13*1+0x1c]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 8.2
- Core cycles: 80.1
- Reference cycles: 52.26
- UOPS_RETIRED.ANY: 88.2
- UOPS_MS: 88.0

BSF (R32, M32) - Throughput and Uops

With a non-indexed addressing mode

With 1 independent instruction

With unroll_count=500 and no inner loop

With loop_count=1000 and unroll_count=10

With loop_count=100 and unroll_count=100

With 4 independent instructions

With unroll_count=200 and no inner loop

With loop_count=1000 and unroll_count=2

With loop_count=100 and unroll_count=20

With 8 independent instructions

With unroll_count=100 and no inner loop

With loop_count=1000 and unroll_count=1

With loop_count=100 and unroll_count=10

With an indexed addressing mode

With 1 independent instruction

With unroll_count=500 and no inner loop

With loop_count=1000 and unroll_count=10

With loop_count=100 and unroll_count=100

With 4 independent instructions

With unroll_count=200 and no inner loop

With loop_count=1000 and unroll_count=2

With loop_count=100 and unroll_count=20

With 8 independent instructions

With unroll_count=100 and no inner loop

With loop_count=1000 and unroll_count=1

With loop_count=100 and unroll_count=10